re-read what you've been told
So in general, I shouldn't be worried about it?
transmission REQUIRES penetration...you had NO risk and do not need testing.
I am sure there was no full penetration. I did feel discomfort whenever he tried to push in, even though I stopped him whenever I believed he went too far (fear of further discomfort and penetration).
Feeling pressure is not penetration.
I felt a little bit of pressure but I tried stopping it whenever I felt discomfort, because I know my anus would be too tight so feeling the pressure could mean possible penetration.
There would not be a "probable', had you been penetrated you would have known.